3Com 3C10114C NBX 4-Port Analog FXO Line Card SS3 Version

Overview

The 3Com NBX 4-Port Analog FXO Line Card SS3 Version (part number 3C10114C) is a compact, high-performance interface module designed for the NBX series telephony gateways. It provides four independent FXO ports that connect traditional analog PSTN lines to a digital IP network, enabling seamless voice migration and cost-effective integration of legacy telephone equipment. Built for reliability and easy installation, this line card supports a wide range of signaling standards and delivers clear, low-latency voice transmission for both small offices and larger enterprise environments.

Key Features

• Four independent FXO ports for analog line connectivity
• Supports loop start, ground start and E&M signaling
• Integrated echo cancellation for improved voice quality
• Hot-swap capable for zero-downtime maintenance
• Compact SS3 form factor for space-constrained rack installations
• Power over Ethernet (PoE) compatible when used with supporting NBX chassis

Technical Specifications

• Port type: FXO (foreign exchange office)
• Number of ports: 4
• Impedance: 600 ohm typical
• Operating voltage: 48 V DC (supplied by NBX chassis)
• Temperature range: 0 to 45 deg Celsius
• Humidity: 10 to 90 percent non-condensing
• Dimensions: 1U rackmount, 4.5 in height
• Compliance: FCC Part 15 Class B, CE

Typical Applications

• Connecting legacy analog telephone sets to an IP PBX
• Extending PSTN service to remote branch offices via a central VoIP core
• Hybrid voice environments that require both analog and digital lines
• Small to medium business telephony solutions looking to reduce carrier costs
• Disaster recovery setups where analog fallback lines are required